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-rw-r--r--mm/swap.c90
1 files changed, 11 insertions, 79 deletions
diff --git a/mm/swap.c b/mm/swap.c
index bbc1ce9f9460..ab498ea04ae3 100644
--- a/mm/swap.c
+++ b/mm/swap.c
@@ -271,94 +271,27 @@ static void update_page_reclaim_stat(struct zone *zone, struct page *page,
}
/*
- * A page will go to active list either by activate_page or putback_lru_page.
- * In the activate_page case, the page hasn't active bit set. The page might
- * not in LRU list because it's isolated before it gets a chance to be moved to
- * active list. The window is small because pagevec just stores several pages.
- * For such case, we do nothing for such page.
- * In the putback_lru_page case, the page isn't in lru list but has active
- * bit set
+ * FIXME: speed this up?
*/
-static void __activate_page(struct page *page, void *arg)
+void activate_page(struct page *page)
{
struct zone *zone = page_zone(page);
- int file = page_is_file_cache(page);
- int lru = page_lru_base_type(page);
- bool putback = !PageLRU(page);
-
- /* The page is isolated before it's moved to active list */
- if (!PageLRU(page) && !PageActive(page))
- return;
- if ((PageLRU(page) && PageActive(page)) || PageUnevictable(page))
- return;
-
- if (!putback)
- del_page_from_lru_list(zone, page, lru);
- else
- SetPageLRU(page);
-
- SetPageActive(page);
- lru += LRU_ACTIVE;
- add_page_to_lru_list(zone, page, lru);
-
- if (putback)
- return;
- __count_vm_event(PGACTIVATE);
- update_page_reclaim_stat(zone, page, file, 1);
-}
-
-#ifdef CONFIG_SMP
-static DEFINE_PER_CPU(struct pagevec, activate_page_pvecs);
-
-static void activate_page_drain(int cpu)
-{
- struct pagevec *pvec = &per_cpu(activate_page_pvecs, cpu);
- if (pagevec_count(pvec))
- pagevec_lru_move_fn(pvec, __activate_page, NULL);
-}
-
-void activate_page(struct page *page)
-{
+ spin_lock_irq(&zone->lru_lock);
if (PageLRU(page) && !PageActive(page) && !PageUnevictable(page)) {
- struct pagevec *pvec = &get_cpu_var(activate_page_pvecs);
-
- page_cache_get(page);
- if (!pagevec_add(pvec, page))
- pagevec_lru_move_fn(pvec, __activate_page, NULL);
- put_cpu_var(activate_page_pvecs);
- }
-}
+ int file = page_is_file_cache(page);
+ int lru = page_lru_base_type(page);
+ del_page_from_lru_list(zone, page, lru);
-/* Caller should hold zone->lru_lock */
-int putback_active_lru_page(struct zone *zone, struct page *page)
-{
- struct pagevec *pvec = &get_cpu_var(activate_page_pvecs);
+ SetPageActive(page);
+ lru += LRU_ACTIVE;
+ add_page_to_lru_list(zone, page, lru);
+ __count_vm_event(PGACTIVATE);
- if (!pagevec_add(pvec, page)) {
- spin_unlock_irq(&zone->lru_lock);
- pagevec_lru_move_fn(pvec, __activate_page, NULL);
- spin_lock_irq(&zone->lru_lock);
+ update_page_reclaim_stat(zone, page, file, 1);
}
- put_cpu_var(activate_page_pvecs);
- return 1;
-}
-
-#else
-static inline void activate_page_drain(int cpu)
-{
-}
-
-void activate_page(struct page *page)
-{
- struct zone *zone = page_zone(page);
-
- spin_lock_irq(&zone->lru_lock);
- if (PageLRU(page) && !PageActive(page) && !PageUnevictable(page))
- __activate_page(page, NULL);
spin_unlock_irq(&zone->lru_lock);
}
-#endif
/*
* Mark a page as having seen activity.
@@ -457,7 +390,6 @@ static void drain_cpu_pagevecs(int cpu)
pagevec_move_tail(pvec);
local_irq_restore(flags);
}
- activate_page_drain(cpu);
}
void lru_add_drain(void)